Pump



Dec. 3l, 1929. J. w. TATTER PUMP Filed NOV. 2l, 1927 5 Sheets-Sheet l Dec. 31, 1929. J. w. TATTER 1,741,591

v PUMP Filed Nov. 21. 1927 s sheets-sheet 2 Dec. 3l, 1929. w TA1-TER 1,741,591

' PUMP Filed Nov. 2l. 1927 3 Sheets-Sheet 3 Ja? MIZ( fier Fatented Dec. 31, 1929 PATENT oFFicl-.

JOHN W. TATTER, OF OAK PARK, ILLINOIS PUMP Application filed November 21, 1927.' Serial No. 234,743.

M* invention relates to um as for handlin` tr:

fluids. It has among its other objects the production of devices of the kind described Which are compact, convenient, durable, elficient and satisfactory for us'e Wherever found applicable.

A particular object of the invention is to provide an improved device of the kind described for compressing gases.

Another' particular object of the invention is to provide an improved device of the kind described which can be inexpensively manufactured in commercial quantities.

Many other objects and advantages of the construction herein shown and described will y be obvious to those skilled in the art from the disclosure herein given. 4

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts Fig. 1 is a side elevation of a pump embodying the invention, certain parts of the pump being shown in section to better illus-- trate certain details of construction;

Fig. 2 is a section taken on line 2-2 of Fig. 1;

i. L o

liig. 3 is a section taken on line 0 3 ofl Fig. 2;

F1g. 4 1s a section taken on line Ll-l oYL Fig. 2; y

Fig. 5 is a section taken on line 0 5 of Fig. 1; l t

Fig. 6 is a substantially central section taken through a pump Vwhich embodies another forni of the invention; and

Fig. 7 is a section taken on line 7 7 of Fig. 6. l

Referring for the present to Figs. l to 5,1nclusive, wherein I have shown a preferred form of the invention embodied in a pump,

the reference character 10 designates a housing or block which forms the body portion of the pump. The bloclr 10.is provided With a base 11 Which may be formed integral therewith, as shown, or may be bolted or i otherwise secured thereto. Formed in the block 10 are a plurality of cylindrical chambers 11i and arranged therein are a plurality of pistons 15. Any desired number of chambers may be provided in the block 10, but in this instance, three pairs of chambers are arranged around an axis of rotation, the pairs of chambers 14 being angularly disposed at 120 degrees from each other around the axis of rotation.

The pistons 15 are preferably provided With piston rings 16 and a rod 18 preferably. extends through each pair of pistons. As best shown in Figs. 2 and 8, block 10 is provided with a plurality of slots 2O which permit the rods 18 to be laterally displaced toward and away from the aforementioned axis of rotation. Journaled upon each end of each rod 18 is an arcuate shoe 22, the shoes 22 being arranged to ride in annular grooves or cam slots 24 and 25. The annular grooves 24 anc 25 are preferably formed in annular members 27 and 28, respectively, which are preferably rotatably journaled upon an annular flange 27 and a disk 28a, respectively, ball bearings 27b and 281 being preferably inw terposed between the annular members 27 and 28 and the iange 27a and the disk 28a, respectively. The flange 27a is preferably formed integral with a shaft 28c and the disk 28 is preferably keyed to the shaft 28. In this embodiment of the invention, two oppositely disposed shoes 22 are rigidly secured tothe annular members 27 and 28 by set screws 22a, or the equivalent. Referring now to Figs. 1 and 3, it Will be noted that the annular slots 211 and are eccentrically disposed With respect to the axis of rotation ofthe shaft 28C. Obviously, When the shaft is rotated, the rods 18 Will be radially disY placed with respect to the axis of rotation of the shaft. 1n other Words, a reciprocatory movement toward and away from the shaft 28 will be imparted to the rods 18 which will in turn reciprocate the pistons 15 in chambers 14.

Enclosing the disk 2S and rigidly secured to the block 10 is a housing member 32 and enciosing the fiange 27 and also rigidly secured to the block 10 is a housing member 83, the housing member 33 being preferably provided with a bearing 34 for the shaft 28C.

Associated with the outer ends of each pair of chambers 14 is a valve cage 38 provided with a pair of intake valves 39 and a single exhaust valve 40. As shown, each of the intake valves 39 is preferably coaxially disposed with respect to one of the chambers 14 and the exhaust valve 40 is preferably disposed intermediate its associated chambers in such manner that both chambers may exhaust therethrough. Valve seats 42 are provided in each 58 for the intake valves 39 and a valve seat 43 is providet for the exhaust valve 40. yl`he intake valve 39 may open inwardly into the chambers 14 against the action of compression springs 45 and the exhaust valve 40 may open against the action of a compression spring 45.

Each valve cage 8S is preferably provided witha plurality of ports 43 through which air may enter the associated chambers 14 when the valves 39 are unseated, rlhe valve cages are also provided with substantially central passages 50, in which the valves 40 are mounted, the passages being arranged to discharge in a manifold 51 which is secured to the valve cages 38 by bolts 52, or vthe equivalent. The manifold 51 is provided with a discharge conduit 54 through which fluid under pressure may be delivered to a tank or any other suitable apparatus.

T he operation of the above described apparatus is substantially as follows: Assuming that the sliaf 25C is connected to any suitable apparatus (not shown) whereby it is rotated, it is obvious that the pistons 15 will be reciprocated in the chamber 14 and that during` each stroke of each pair of pistons toward the axis of rotation of the shaft 28C, air will be drawn into the chambers 14 througn the associated ports 48, the valves 39 being unseated by atmospheric pressure. During the outward strokes of cylinders, the drawn into the chambers 14 will be compressed and when the pressure in the chambers eX-.

ceeds the pressure obtaining in the manifold 51, the valve 40 will be unseat-ed and the pistons will force the compressed air into the n'isni'fold. Of course, the valve 40 seats the moment the pistons 15 begin their return strokes toward the anis of rotation of the shaft.

It will be noted that the shaft 28C, the flange 27@ and the disk 28LL are the only parts that rotate. The block 10 is stationary. rihe set screws 22a prevent rotation of the members 27 and 28. This construction is advantageous as it is a substantially simple matter to lubricate the bea ring surfaces of the rotating parts.

ln Figs. 6 and 7, I have illustrated another form of the invention embodied in apparatus which preferably comprises a frame or housing 60. The frame or housing G0 preferably comprises blocks 61 and 62 which are rigidly secured to each other by bolts 63, or the equivalent. Formed integral with the block 61 is a base 64 adapted to rest upon any suitable support. Rotatably journaled in the blocks G1 and 62 is one end of a shaft 66 to which isv keyed a disk 68. Mounted upon the periphery of the disk-68 is the inner race 69 of a ball bearing 70 which also comprises an outer race 71 mounted in a relatively large aperture T2 which is provided in an annular member 73. he disk 68, the ball bearing 70 and the annular member 73 are disposed in a chamber 75 formed by providing substantially circular recesses .76 and 77 in the blocks G1 and 62, respectively* 1t will be noted that the disk 68 is arranged eccentrically upon the shaft 66 and that the annular member 73 is arranged concentrically with respect to the disk Projecting through the annular member 73 are a plurality of pins 80, 8Oa and 80h and mounted upon the ends of the pins are pistons 81 adapted to be reciprocated in chambers 83 provided in the blocks 61 and 62. The pin 8O is preferably fixed or journaled in the annular member 73 and the pins 8Oa and SO" are preferably iiXed or journaled in A arcuate shoes 80C and 80d, respectively, that ride in arcuate siots 8Oe provided in the annular member 73. rihe pins SO, SO@ and 80h ride in slots 8O' formed in the blocks G1 and 62, the siots S'Of being preferably arranged radially with respect to the axis of rotation of the shaft 66. lt will be noted that the piston chambers 83 are arranged in pairs so that cach of the pins 80, 8Ua and 8Ob project into a piston 81 disposed in a chamber 83 formed in the block 61 and also projects int-o a. piston 81 Idisposed in a chamber 83 formed in the block 62. The outer ends of each pair of chambers 83 communicate with each other through passages 85 formed in the blocirs 61 and 62.

In the embodiment of the invention illustrated in Figs. 6 and 7, three pairs of chambers 83 are provided and these chambers communicate with a manifold 87 through passages 88 provided in vaive cages 90 secured to the blocks 61 and 62. A valve cage 90 is provided for each pair of chambers 83 and mounted therein is an exhaust valve 92 and a pair of intake valves 93, the arrangement being such that when the exhaust valve 92 is unseated7 fluid may pass from the associated pair of cylinders or chambers 83 into the associated passage 88 and thence into the exhaust manifold 87. A valve seat 95 is provided for each valve 92 and each valve 93 is adapted to engage a valve seat 97 formed in the associated cage 90. Ports 100 provided in the valve cages 90 permit air to enter the chambers 83 when the valves 93 are unseatef Compression springs 101 yieldingly hold the valves 92 in engagement With the valve seats 95 and compression springs 102 yieldingly hold the valves 93 in engagement with the valve seats 97.

It Will be noted that the disk 68, the ball bearing and the annular member 78 are disposed intermediate the` blocks 61 and 62. This construction permits relatively short pins SO to be employed and provides a compact device.

The operation of the apparatus shown in Figs. 6 and 7 is substantially as follows: Assuming that the shaft 66 is driven by any suitable means (not shown) itis obvious that the disk 68 Will rotate in unison With the shaft and that the annular member 73 will be displaced in such manner that the pinslSO, 80a and 8()b carried thereby'will reciprocate the pistons 8l in the cylinders or chambers S3. Each time the pistons are displaced toward the axis of rotation of the shaft 66, the springs 102 yield so that the valves 93 are unseated and air enters the chambers through the openings 100. During the following outward stroke of the pistons 81, the valves 93 are seated and the spring 101 yields so that the air compressed in the chambers 83 will pass therefrom through the associated passage 8S into the manifold 87, which is connected With any suitable apparatus (not shown) such as a tank, or the equivalent.

Having thus described my invention, it is obvious tiat various immaterial modifications may be made therein Without departing from the spirit of my invention; hence 1 do not Wish to limit myself to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

1. A device of the kind described comprising in combination a non-rotatable member having a chamber formed therein, a piston disposed in said chamber, intake and exhaust valves for said chamber, a rotatable shaft extending through said member, a pin extendin, a plurality of pistons disposed in said chambers, intake and exhaust valves for said chambers, pins extending through said pistons and through said member, a shaft, and means constrained to rotate with the shaft and engageable With the ends of said pins for reciprocating the pistons.

3. A device of the kind described comprising in combination a non-rotatable member having a pair of chambers formed therein, a plurality of pistons in said chambers, intake and exhaust valves for said chambers, a rotatable shaft, a plurality of means constrained to rotate With said shaft, one of said plurality of means being disposed on one side of said member and another of said plurality of means being disposed on the other side of said member, and pins engaging said plurality of means and operatively connecting said pistons for reciprocating them in the chambers.

4. A device of the kind described comprising in combination a non-rotatable member having a pair of chambers formed therein, a pair of pistons in said chambers, intake and exhaust valves for said chambers, a rotatable shaft, a plurality of means constrained to rotate said shaft, one of said plurality of means being disposed on one side of said member and another of said plurality of means being disposed on the other side of said member, and pins engaging said plurality of means and operatively connecting said pistons for reciprocating them in the chambers, and a manifold for operatively connecting said exhaust valves to any desired apparatus.

5. A device of the kind described comprising in combination a non-rotatable member having a pair of chambers formed therein, pistons in said chambers, intake and exhaust valves in said chambers, a rotatable shaft, a plurality of members constrained to rotate With said shaft and provided With cam slots, one of said cam slot members being on one side of said non-rotatable member and the other cam slot member being on the other side of said non-rotatable member, and pins joining the pistons and engaging the cam slots.

6. A device of the kind described comprising a non-rotatable member having a plurality of chambers formed therein and disposed in pairs, pistons disposed in said chambers, members joining each pair of pistons, a rotatably j ournaled shaft, and means constrained to rotate With said shaft and provided With a cam slot operatively engaging said members for reciprocating the pistons, each pair of pistons being reciprocated as a unit, a valve and valve seat for each of said chambers, the valves for each pair of chambers being adapted to conduct a fluid in the same direction, and a valve and a valve seat connected to each pair of chambers adapted to conduct a fluid in the opposite direction from that of the individual valves of said pair of chambers.

7. A device 0f the kind described comprising in combination a non-rotatable member having a chamber formed therein, a piston disposed in said chamber7 intake and exhaust Valves for said chamber, a pin extending through said piston and through said meinber, a shaft, and means constrained to rotate with the shaft and engageable with the ends of said pin for reciprocating the piston.

In testimony whereof, I have hereunto signed my name.

JOHN W. 'TATTER 

